Air and grease from feed water



(ModeL) D. D. WASS.

REMOVING AIR AND GREASE FROM EEEE WAT R. No. 245,896. Patented Aug.16,1881.

UNITED STATES PATENT OFFICE.

DYSON D. WASS, OF SAN FRANCISCO, CALIFORNIA.

REMOVING AIR AND GREASE FROM FEED-WATER.

SPECIFICATION formingpart of Letters Patent No. 245,896, dated August16, 1881.

Application filed. February 12, 1881.

To all whom it may concern.-

Be it known that I, DYSON D. WAss, of

San Francisco, in the county of San Francisco and State of California,have invented a new and Improved Device for Removing Air and Grease fromFeed-Water, of which the following is a specification.

The object of my invention is to free the feed-water for boilers fromthe grease and air which are carried from the cylinder of an engine intothe feed-water tank by the exhauststeam whichis generally used to heatthis feedwater.

The invention consists in a chamber into which the pipe from thefeed-pump conducts the feed-water, this water being drawn from thischamber below the surface, so that the oil and grease which rise to thesurface of the water cannot leave the chamber with the water. As the airforced into this closed chamher is compressed therein and forces thelevel of the water downward, a float-valve is provided, which opens anair-cock to allow the air to escape as soon as the water-level drops toa certain extent.

In the accompanying drawings, Figure l is a cross-sectional elevation ofmy improved device for removing grease and air from feed water. Fig. 2is a plan view of the same, showing the top removed.

Similar letters of reference indicate corresponding parts.

The feed-water from the feed'pump passes through the pipe A into thevessel B, provided with a lid, 0, which closes the vessel air-tight. Thepipe A enters into the vessel B near the bottom. Another pipe, D, alsoenters the vessel'B near the bottom, rises to the top, is then bent, andextends downward to near the bottom of the vessel. Through this pipe Dthe water passes off into the boiler.

A pipe, E, enters into the vessel B near the top of the same, and theinner end of this pipe forms a seat for a valve, F, pivoted to the shortarm of a bell-crank lever, G, to the end of the long arm of which afloat, H, is fastened. A pipe, R,iprovided with a valve L, enters intothe lid 0, for the purpose of carryin g off the grease.

"The operation is as follows: The grease or oil that isdrawn into thefeed-water by the (Model) exhaust-steam is very injurious to the boiler,and must he removed before this water is forced into the boiler. Thegrease, oil, and air contained in the feed-water will rise to thesurface in the vessel 13, as they are all lighter than the water, andvery soon a layer of grease or oil will be formed on the surface of thiswater. As the water thatleaves this vesselB is drawn far below thesurface through the pipe D, none of the grease or oil can leave thevessel B with this water, and only pure water passes to the boiler; butthe air that collects in the upper part of the vessel B will very soonbecome compressed, and will force out the water very rapidly, therebylowering the level in the vessel B, and might depress this levelsufficiently to permit the grease to pass through the pipe D. Topreventthis sinking of the surface of the water I have provided thevalve F and the float H, for as soon as the compressed air forces thelevel of the, water downward the float H follows, and thereby opens thevalveF, thus liberating the compressed air and causingthe water toriseagain, whereby the valve F is also closed, and remains so untilthere is another excess of pressure in the vessel B. The valve or cock Lis opened, and thus allows the air to escape and the space to fill upwith water, and the water wilLflow oft through the pipe R as long as thecock L is open; As the grease is on the top of the water it willnecessarily flow off.

I am aware that it is not new to hohl the valve of a supplypipe open orclosed by a hinged float, or to have inletor outlet pipes entered belowthe water-level; but

What I do claim as new and of my invention is The combination, with avessel, B, having the air-tight cover 0, of the valved pipe R on saidcover, the inlet and outlet pipes A D, connecting with the vessel belowthe water-level, the pipe E,'entering the vessel above the water-level,and the valve F, lever G, and float H, connected with said pipe E, allconstructed and arranged substantially as shown and described.

DYSON DEARBON W'ASS.

Witnesses:

J. A. HOWELL, ALBERT G. LAWRENCE.

